5811540 has 96 divisors (see below), whose sum is σ = 18918144. Its totient is φ = 1305600.

The previous prime is 5811529. The next prime is 5811599. The reversal of 5811540 is 451185.

It is a self number, because there is not a number n which added to its sum of digits gives 5811540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42352 + ... + 42488.

It is an arithmetic number, because the mean of its divisors is an integer number (197064).

Almost surely, 2^5811540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5811540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9459072).

5811540 is an abundant number, since it is smaller than the sum of its proper divisors (13106604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5811540 is a wasteful number, since it uses less digits than its factorization.

5811540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 5811540 is about 2410.7135873015. The cubic root of 5811540 is about 179.7892595383.

The spelling of 5811540 in words is "five million, eight hundred eleven thousand, five hundred forty".